Human Nature

Human nature has not changed a bit since stone age.
All the advancement of science cound not change the human nature.
All the wealth of the world cound not change the human nature.
All the laws of the world cound not change the human nature.
All the religions of the world cound not change the human nature.
All the medicines of the world could not change the human nature.
All the wise and great men and women of the world could not change the human nature.

Most of us are still selfish.
Most of us are still greedy.
Most of us are still hate each other.
Most of us are still conscious of our color, race, and creed.
Most of us are still don't help each other.

Now the obvious question is why?

I don't know the answer.

I welcome your ideas on this important issue.